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Transparency

Transparent - Opaque

Luster

Vitreous

Tourmaline

Locales

Hardness

7-7.5
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10

Treatment

Interesting Fact

Chemical Formula

Composition

complex boron silicate mineral composed of aluminium, iron, magnesium and more

Colours

Red
Orange
Yellow
Green
Blue
Purple
Brown
Black